Thanks for this report, I can confirm the problem here. Yet again Apple, having recommended a procedure for adding environment variables, has quietly abandoned it (they say, for security reasons) in Yosemite. There is yet another new recommended procedure. I will announce it separately on the forum, but in the meantime, create a text file called "environment.plist" with the following content:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "
http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>my.startup</string>
<key>ProgramArguments</key>
<array>
<string>sh</string>
<string>-c</string>
<string>launchctl setenv CDP_SOUND_EXT wav</string>
</array>
<key>RunAtLoad</key>
<true/>
</dict>
</plist>
Copy the file to your Library/LaunchAgents folder and reboot. I have tested this and it does enable the pvoc programs to run both from Terminal and via Soundloom.
In the longer term, we are finalising the process of updating the whole CDP system to make this variable default to wav and so be entirely optional, and this whole rigmarole will no longer be needed.